forked from git/git
/
test-cmp.c
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/
test-cmp.c
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#include "test-tool.h"
#include "git-compat-util.h"
#include "strbuf.h"
#include "gettext.h"
#include "parse-options.h"
#include "run-command.h"
#ifdef WIN32
#define NO_SUCH_DIR "\\\\.\\GLOBALROOT\\invalid"
#else
#define NO_SUCH_DIR "/dev/null"
#endif
static int run_diff(const char *path1, const char *path2)
{
const char *argv[] = {
"diff", "--no-index", NULL, NULL, NULL
};
const char *env[] = {
"GIT_PAGER=cat",
"GIT_DIR=" NO_SUCH_DIR,
"HOME=" NO_SUCH_DIR,
NULL
};
argv[2] = path1;
argv[3] = path2;
return run_command_v_opt_cd_env(argv,
RUN_COMMAND_NO_STDIN | RUN_GIT_CMD,
NULL, env);
}
int cmd__cmp(int argc, const char **argv)
{
FILE *f0, *f1;
struct strbuf b0 = STRBUF_INIT, b1 = STRBUF_INIT;
if (argc != 3)
die("Require exactly 2 arguments, got %d", argc);
if (!(f0 = !strcmp(argv[1], "-") ? stdin : fopen(argv[1], "r")))
return error_errno("could not open '%s'", argv[1]);
if (!(f1 = !strcmp(argv[2], "-") ? stdin : fopen(argv[2], "r"))) {
fclose(f0);
return error_errno("could not open '%s'", argv[2]);
}
for (;;) {
int r0 = strbuf_getline(&b0, f0);
int r1 = strbuf_getline(&b1, f1);
if (r0 == EOF) {
fclose(f0);
fclose(f1);
strbuf_release(&b0);
strbuf_release(&b1);
if (r1 == EOF)
return 0;
cmp_failed:
if (!run_diff(argv[1], argv[2]))
die("Huh? 'diff --no-index %s %s' succeeded",
argv[1], argv[2]);
return 1;
}
if (r1 == EOF || strbuf_cmp(&b0, &b1)) {
fclose(f0);
fclose(f1);
strbuf_release(&b0);
strbuf_release(&b1);
goto cmp_failed;
}
}
}